Showing structure for COC(=O)CC(=O)OCC1OC(OC2=CC(O[Si](C)(C)C(C)(C)C)=C3C(=O)C(C4=CC=C(OC)C=C4)=COC3=C2)C(O[Si](C)(C)C(C)(C)C)C(O)C1O[Si](C)(C)C(C)(C)C